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2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
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5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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35 #ifndef MTHCA_MEMFREE_H
36 #define MTHCA_MEMFREE_H
38 #include <linux/list.h>
39 #include <linux/pci.h>
41 #include <asm/semaphore.h>
43 #define MTHCA_ICM_CHUNK_LEN \
44 ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \
45 (sizeof (struct scatterlist)))
47 struct mthca_icm_chunk
{
48 struct list_head list
;
51 struct scatterlist mem
[MTHCA_ICM_CHUNK_LEN
];
55 struct list_head chunk_list
;
59 struct mthca_icm_table
{
65 struct semaphore mutex
;
66 struct mthca_icm
*icm
[0];
69 struct mthca_icm_iter
{
70 struct mthca_icm
*icm
;
71 struct mthca_icm_chunk
*chunk
;
77 struct mthca_icm
*mthca_alloc_icm(struct mthca_dev
*dev
, int npages
,
78 unsigned int gfp_mask
);
79 void mthca_free_icm(struct mthca_dev
*dev
, struct mthca_icm
*icm
);
81 struct mthca_icm_table
*mthca_alloc_icm_table(struct mthca_dev
*dev
,
82 u64 virt
, int obj_size
,
83 int nobj
, int reserved
,
85 void mthca_free_icm_table(struct mthca_dev
*dev
, struct mthca_icm_table
*table
);
86 int mthca_table_get(struct mthca_dev
*dev
, struct mthca_icm_table
*table
, int obj
);
87 void mthca_table_put(struct mthca_dev
*dev
, struct mthca_icm_table
*table
, int obj
);
89 static inline void mthca_icm_first(struct mthca_icm
*icm
,
90 struct mthca_icm_iter
*iter
)
93 iter
->chunk
= list_empty(&icm
->chunk_list
) ?
94 NULL
: list_entry(icm
->chunk_list
.next
,
95 struct mthca_icm_chunk
, list
);
99 static inline int mthca_icm_last(struct mthca_icm_iter
*iter
)
104 static inline void mthca_icm_next(struct mthca_icm_iter
*iter
)
106 if (++iter
->page_idx
>= iter
->chunk
->nsg
) {
107 if (iter
->chunk
->list
.next
== &iter
->icm
->chunk_list
) {
112 iter
->chunk
= list_entry(iter
->chunk
->list
.next
,
113 struct mthca_icm_chunk
, list
);
118 static inline dma_addr_t
mthca_icm_addr(struct mthca_icm_iter
*iter
)
120 return sg_dma_address(&iter
->chunk
->mem
[iter
->page_idx
]);
123 static inline unsigned long mthca_icm_size(struct mthca_icm_iter
*iter
)
125 return sg_dma_len(&iter
->chunk
->mem
[iter
->page_idx
]);
129 MTHCA_DB_REC_PER_PAGE
= 4096 / 8
132 struct mthca_db_page
{
133 DECLARE_BITMAP(used
, MTHCA_DB_REC_PER_PAGE
);
138 struct mthca_db_table
{
142 struct mthca_db_page
*page
;
143 struct semaphore mutex
;
147 MTHCA_DB_TYPE_INVALID
= 0x0,
148 MTHCA_DB_TYPE_CQ_SET_CI
= 0x1,
149 MTHCA_DB_TYPE_CQ_ARM
= 0x2,
150 MTHCA_DB_TYPE_SQ
= 0x3,
151 MTHCA_DB_TYPE_RQ
= 0x4,
152 MTHCA_DB_TYPE_SRQ
= 0x5,
153 MTHCA_DB_TYPE_GROUP_SEP
= 0x7
156 int mthca_init_db_tab(struct mthca_dev
*dev
);
157 void mthca_cleanup_db_tab(struct mthca_dev
*dev
);
158 int mthca_alloc_db(struct mthca_dev
*dev
, int type
, u32 qn
, u32
**db
);
159 void mthca_free_db(struct mthca_dev
*dev
, int type
, int db_index
);
161 #endif /* MTHCA_MEMFREE_H */